workaround for buggy strtod is not necessary

Solaris had broken strtod function when parse "Inf" and "Nan". See 
solaris.h. This bug has been fixed for all current versions of Solaris ( 
8, 9, 10). See

http://sunsolve.sun.com/search/document.do?assetkey=1-21-108993-62-1&searchclause=108993-62
http://sunsolve.sun.com/search/document.do?assetkey=1-21-112874-34-1&searchclause=112874-34


Workaround is not necessary now, but I'm not sure if workaround removing 
is good idea. There are some possible variants:


1) keep workaround in the code for compatibility with unpatched system 
and adjust comment in solaris.h

2) remove workaround and mention required Solaris patch in the 
Solaris.FAQ document

3) add some test into configure script and use workaround only on 
unpatched system. (It should be nightmare for packagers)


Any suggestion?
    Thanks Zdenek